US20130221912A1 - Wireless charging control method and wireless charging apparatus employing the same - Google Patents
Wireless charging control method and wireless charging apparatus employing the same Download PDFInfo
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- US20130221912A1 US20130221912A1 US13/766,397 US201313766397A US2013221912A1 US 20130221912 A1 US20130221912 A1 US 20130221912A1 US 201313766397 A US201313766397 A US 201313766397A US 2013221912 A1 US2013221912 A1 US 2013221912A1
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 79
- 230000000977 initiatory effect Effects 0.000 claims abstract description 3
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 230000004044 response Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 8
- 230000005672 electromagnetic field Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
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Classifications
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- H02J7/025—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/10—The network having a local or delimited stationary reach
- H02J2310/20—The network being internal to a load
- H02J2310/22—The load being a portable electronic device
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
Definitions
- the present invention relates generally to a charging control method and apparatus, and more particularly, to a method and apparatus for controlling a supply of wireless charging power.
- a resonance type wireless power transmission scheme which is able to charge a device at a relatively long distance (in contrast a typical wireless charging scheme using inductive coupling at a short distance) has been recently proposed, and research for the resonance type wireless power transmission scheme is currently ongoing.
- the resonance type wireless power transmission scheme is based on Evanescent Wave Coupling wherein, when two mediums resonate with each other at the same frequency, electromagnetic waves move from one medium to the other medium through a short-distance electromagnetic field.
- a charging station connected to a power source generates an electromagnetic field
- a wireless power receiving apparatus designed with the same resonance frequency in a megahertz (MHz) band approaches the charging station within the generated electromagnetic field.
- MHz megahertz
- the energy generated in the resonance type wireless power transmission scheme is non-radiative and is based on the electromagnetic field, the energy is only transferred to an apparatus that has the same resonance frequency. Further, an unused portion of the energy is absorbed back into the electromagnetic field, instead of being spread into the air. Therefore, unlike other electromagnetic waves, the electromagnetic waves generated in the resonance type wireless power transmission scheme do not have any effect on surrounding machines or bodies.
- FIG. 1 is a block diagram illustrating a construction of a conventional resonance type wireless power transmission system
- FIG. 2 is a signal flow diagram illustrating an operation of a conventional resonance type wireless power transmission system.
- a wireless power transmitting apparatus 10 wirelessly supplies power to a plurality of wireless power receiving apparatuses 20 .
- the wireless power transmitting apparatus 10 receives a request for wireless power supply from a third wireless power receiving apparatus 23 , and additionally supplies the wireless power to the third wireless power receiving apparatus 23 .
- the second and third wireless power receiving apparatuses 22 and 23 are receiving the wireless power supplied from the wireless power transmitting apparatus 10 , the charging of the first wireless power receiving apparatus 21 is completed.
- the wireless power transmitting apparatus 10 wirelessly supplies power to the first and second wireless power receiving apparatus 21 and 22 , in step 201 . Thereafter, the third wireless power receiving apparatus 23 requests the wireless power transmitting apparatus 10 to supply wireless power, in step 202 . Accordingly, the wireless power transmitting apparatus 10 calculates the charging power required by the first, second and third wireless power receiving apparatuses 21 , 22 , and 23 , and calculates the sum of the wireless power to be transmitted to the first, second and third wireless power receiving apparatuses 21 , 22 , and 23 , in step 203 .
- the wireless power transmitting apparatus 10 transmits the sum of the wireless power calculated in step 203 to the first, second and third wireless power receiving apparatuses 21 , 22 , and 23 , in step 204 . Thereafter, when the charging of the first wireless power receiving apparatus 21 has been completed, the first wireless power receiving apparatus 21 notifies the wireless power transmitting apparatus 10 of the completion of the charging, in step 205 . In response to this notification, the wireless power transmitting apparatus 10 calculates the charging power required by the second and third wireless power receiving apparatuses 22 and 23 , and calculates the sum of the wireless power to be transmitted to the second and third wireless power receiving apparatuses 22 and 23 , in step 206 . Then, the wireless power transmitting apparatus 10 transmits the sum of the wireless power calculated in step 206 to the second and third wireless power receiving apparatuses 22 and 23 , in step 207 .
- a conventional wireless power transmission system wirelessly supplies power to a plurality of wireless power receiving apparatuses 20 .
- the conventional wireless power transmission system has a problem in that the conventional system cannot individually control the wireless power provided to each of the plurality of wireless power receiving apparatuses 20 .
- the wireless power transmitting apparatus 10 in wirelessly supplying power to the plurality of wireless power receiving apparatuses 20 by the wireless power transmitting apparatus 10 , the wireless power transmitting apparatus 10 merely transmits the sum of the wireless power requested by the plurality of wireless power receiving apparatuses 20 , regardless of any difference between powers required by the respective wireless power receiving apparatuses 20 . Therefore, under some circumstances, the power transmitted by the wireless power transmitting apparatus 10 may be less than the power required for charging the wireless power receiving apparatuses 20 , which may make it impossible to perform a normal charging.
- an aspect of the present invention is to address the above-mentioned problems occurring in the prior art, and provide at least the advantages described below.
- Another aspect of the present invention is to provide a method for providing wireless power to a plurality of wireless power receiving apparatuses by a single wireless power supplying apparatus.
- a method of controlling charging of a battery by a wireless power receiving apparatus, using a charging power provided from a wireless power transmission device includes initiating charging of a battery by using a charging power provided by a resonator for wirelessly receiving power; determining whether charging of the battery has been completed; and terminating, when the charging of the battery has been completed, an operation of the resonator.
- a wireless power receiving apparatus for wirelessly receiving electric power from a wireless power transmitting apparatus through an electromagnetic coupling with the wireless power transmitting apparatus.
- the wireless power receiving apparatus includes a reception resonator set to a resonance frequency equal to a resonance frequency of a wireless power transmission apparatus, the reception resonator being coupled with a transmission resonator of the wireless power transmitting apparatus and receiving electric power from the transmission resonator; a switch connected to the reception resonator; and a charging controller for supplying the electric power received through the reception resonator to a battery, determining whether charging of the battery has been completed, controlling the switch such as to cease operation of the reception resonator upon determining that charging of the batter has completed.
- a wireless power transmitting apparatus for wirelessly supplying electric power to a wireless power receiving apparatus through an electromagnetic coupling with the wireless power receiving apparatus.
- the wireless power transmitting apparatus includes a transmission resonator set to a resonance frequency equal to a resonance frequency of a wireless power receiving apparatus, the transmission resonator being coupled with a reception resonator of the wireless power receiving apparatus and providing electric power to the reception resonator; and a transmission controller for controlling an operation of the transmission resonator according to a charging state of the wireless power receiving apparatus.
- FIG. 1 is a block diagram illustrating an example of a conventional resonance type wireless power transmission system
- FIG. 2 is a signal flow diagram illustrating an example of an operation of a conventional resonance type wireless power transmission system
- FIG. 3 is a block diagram illustrating a construction of a wireless power receiving apparatus according to an embodiment of the present invention
- FIG. 4 is a flowchart illustrating a process of a charging control method according to an embodiment of the present invention.
- FIG. 5 is a block diagram illustrating a construction of a wireless power transmitting apparatus according to an embodiment of the present invention.
- the present invention has been made to solve the above-mentioned problems and provides a method and an apparatus for controlling a wireless power receiving apparatuses by connecting an on/off switch to a reception resonator of the wireless power receiving apparatus.
- FIG. 3 is a block diagram illustrating a construction of a wireless power receiving apparatus 30 according to an embodiment of the present invention
- FIG. 5 is a block diagram illustrating a construction of a wireless power transmitting apparatus 50 according to an embodiment of the present invention.
- the wireless power receiving apparatus 30 includes a reception resonator 31 , a switch 32 , a charging controller 33 , and a battery 34 .
- the reception resonator 31 is set to have the same resonance frequency as a resonance frequency of a transmission resonator 51 of the wireless power transmitting apparatus 50 . Accordingly, the reception resonator 31 is coupled and resonates with the transmission resonator 51 .
- the reception resonator 31 of the wireless power receiving apparatus 30 is coupled and resonates with the transmission resonator 51 of the wireless power transmitting apparatus 50 , wireless power is transferred from the wireless power transmitting apparatus 50 to the wireless power receiving apparatus 30 , and the wireless power receiving apparatus 30 is thus charged.
- the switch 32 is connected with the reception resonator 31 , so as to control the coupling between the reception resonator 31 and the transmission resonator 51 of the wireless power transmitting apparatus 50 .
- the charging controller 33 interrupts the connection between the reception resonator 31 and the battery 34 in order to terminate the connection between the reception resonator 31 and the battery 34 . To this end, the charging controller 33 checks whether the charging of the battery 34 has been completed. When the charging has been completed, the charging controller 33 controls the switch 32 (i.e., opens or closes the switch 32 ) so as to interrupt the coupling between the reception resonator 31 and the transmission resonator 51 of the wireless power transmitting apparatus 50 .
- FIG. 4 is a flowchart illustrating a charging control method according to an embodiment of the present invention.
- step 401 the wireless power receiving apparatus 30 starts wireless charging by receiving power transmitted from the wireless power transmitting apparatus 50 and supplying the charging power to the battery 34 .
- step 402 the wireless power receiving apparatus 30 continues receiving wireless charging power while consistently monitoring at least one of the voltage of the battery 34 and the charging current provided to the battery 34 . Based upon the monitoring, the wireless power receiving apparatus 30 checks whether the charging of the battery 34 has been completed in step 403 .
- step 403 Upon a determination that charging has been completed, in step 403 , the switch 32 connected to the reception resonator 31 of the wireless power receiving apparatus 30 is turned off, in step 404 . As a result, the coupling between the reception resonator 31 and the transmission resonator 51 of the wireless power transmitting apparatus 50 is terminated, and the wireless power receiving apparatus 30 does not receive any more wireless power from the wireless power transmitting apparatus 50 .
- the wireless power transmitting apparatus 50 consistently provides the charging power that it can provide, the wireless power receiving apparatus 30 prevents an unnecessary supply of power to the battery 34 of the wireless power receiving apparatus 30 , after battery 34 is completely charged. Further, since unnecessary charging is prevented as described above, when there are a plurality of wireless power receiving apparatuses 30 , the wireless power transmitting apparatus 50 can more intensively provide power to only the wireless power receiving apparatuses 30 that still require charging. Accordingly, charging power is more efficiently supplied to the plurality of wireless power receiving apparatuses 30 .
- the wireless power transmitting apparatus 50 includes a transmission resonator 51 and a transmission controller 53 according to an embodiment of the present invention.
- the transmission resonator 51 is set to have a predetermined resonance frequency, for example, the same resonance frequency as that of the reception resonator 31 of the wireless power receiving apparatus 30 , and transmits a wireless power through the resonance frequency.
- the transmission controller 53 controls the transmission of power to the wireless power receiving apparatus 30 by controlling the operation of the transmission resonator 51 . Specifically, the transmission controller 53 monitors the wireless power transmitted through the transmission resonator 51 , so as to determine whether the wireless power is transmitted to the wireless power receiving apparatus 30 . When the reception resonator 31 of the wireless power receiving apparatus 30 is not coupled with the transmission resonator 51 and the wireless power is not transmitted to the wireless power receiving apparatus 30 at all, the transmission controller 53 stops the operation of the transmission resonator 51 .
- the transmission controller 53 through communication with the wireless power receiving apparatus 30 , the transmission controller 53 receives a charging power supply request from the wireless power receiving apparatus 30 . In response to the charging power supply request, the transmission controller 53 determines whether to permit the transmission of power to the wireless power receiving apparatus 30 , and, from among a plurality of wireless power receiving apparatuses 30 , the transmission controller 53 selectively provides only to the wireless power to wireless power receiving apparatuses 30 for which the transmission of power is permitted.
- the transmission controller 53 controls power transmission to the wireless power receiving apparatus 30 by monitoring the wireless power transmitted through the transmission resonator 51 .
- the transmission controller 53 receives a message, indicating that the charging has been completed, from at least one of the wireless power receiving apparatuses 30 receiving electric power through the communication with the wireless power receiving apparatus 30 .
- the transmission controller 53 of the wireless power transmitting apparatus 50 stops supplying power to the corresponding wireless power receiving apparatus 30 .
- the transmission controller 53 stops the transmission resonator 51 from transmitting any more power.
- a wireless power transmitting apparatus can avoid unnecessarily providing electric power to the wireless power receiving apparatus having a completely charged battery.
- the wireless power transmitting apparatus can provide a necessary quantity of power to the wireless power receiving apparatus, which enables an efficient supply of charging power.
Abstract
A method and apparatus for controlling charging of a battery by a wireless power receiving apparatus, using a charging power provided from a wireless power transmission device are provided. The method includes initiating charging of a battery by using a charging power provided by a resonator for wirelessly receiving power; determining whether charging of the battery has been completed; and terminating, when the charging of the battery has been completed, an operation of the resonator.
Description
- This application claims priority under 35 U.S.C. §119(a) to an application filed in the Korean Industrial Property Office on Feb. 29, 2012 and assigned Serial No. 10-2012-0020957, the entire content of which are incorporated herein by reference.
- 1. Field of the Invention
- The present invention relates generally to a charging control method and apparatus, and more particularly, to a method and apparatus for controlling a supply of wireless charging power.
- 2. Description of the Related Art
- In order for a mobile terminal to operate, power must be consistently supplied to the mobile terminal. To this end, a battery is included in the mobile terminal and is usually charged through a charger. Research on non-contact charging and wireless charging schemes has been conducted, in order to improve the portability of mobile terminals.
- In particular, a resonance type wireless power transmission scheme, which is able to charge a device at a relatively long distance (in contrast a typical wireless charging scheme using inductive coupling at a short distance) has been recently proposed, and research for the resonance type wireless power transmission scheme is currently ongoing.
- The resonance type wireless power transmission scheme is based on Evanescent Wave Coupling wherein, when two mediums resonate with each other at the same frequency, electromagnetic waves move from one medium to the other medium through a short-distance electromagnetic field. In the resonance type wireless power transmission scheme, a charging station connected to a power source generates an electromagnetic field, and a wireless power receiving apparatus designed with the same resonance frequency in a megahertz (MHz) band approaches the charging station within the generated electromagnetic field. When the wireless power receiving apparatus enters the electromagnetic field, a kind of energy tunnel is generated between the two sides, so that the wireless power receiving apparatus can be charged even when the portable apparatus (i.e., the wireless power receiving apparatus) is located several meters from the charging station. Since the energy generated in the resonance type wireless power transmission scheme is non-radiative and is based on the electromagnetic field, the energy is only transferred to an apparatus that has the same resonance frequency. Further, an unused portion of the energy is absorbed back into the electromagnetic field, instead of being spread into the air. Therefore, unlike other electromagnetic waves, the electromagnetic waves generated in the resonance type wireless power transmission scheme do not have any effect on surrounding machines or bodies.
-
FIG. 1 is a block diagram illustrating a construction of a conventional resonance type wireless power transmission system, andFIG. 2 is a signal flow diagram illustrating an operation of a conventional resonance type wireless power transmission system. - Referring to
FIG. 1 , a wirelesspower transmitting apparatus 10 wirelessly supplies power to a plurality of wirelesspower receiving apparatuses 20. According to an example of a conventional sequence of operations, when wirelessly supplying power to first and second wireless power receivingapparatuses power transmitting apparatus 10 receives a request for wireless power supply from a third wirelesspower receiving apparatus 23, and additionally supplies the wireless power to the third wirelesspower receiving apparatus 23. Further, while the second and third wireless power receivingapparatuses power transmitting apparatus 10, the charging of the first wirelesspower receiving apparatus 21 is completed. - Specifically, as shown in
FIG. 2 , the wirelesspower transmitting apparatus 10 wirelessly supplies power to the first and second wirelesspower receiving apparatus step 201. Thereafter, the third wirelesspower receiving apparatus 23 requests the wirelesspower transmitting apparatus 10 to supply wireless power, instep 202. Accordingly, the wirelesspower transmitting apparatus 10 calculates the charging power required by the first, second and third wireless power receivingapparatuses apparatuses step 203. Then, the wirelesspower transmitting apparatus 10 transmits the sum of the wireless power calculated instep 203 to the first, second and third wireless power receivingapparatuses step 204. Thereafter, when the charging of the first wirelesspower receiving apparatus 21 has been completed, the first wirelesspower receiving apparatus 21 notifies the wirelesspower transmitting apparatus 10 of the completion of the charging, instep 205. In response to this notification, the wirelesspower transmitting apparatus 10 calculates the charging power required by the second and third wirelesspower receiving apparatuses apparatuses step 206. Then, the wirelesspower transmitting apparatus 10 transmits the sum of the wireless power calculated instep 206 to the second and third wirelesspower receiving apparatuses step 207. - As described above, a conventional wireless power transmission system wirelessly supplies power to a plurality of wireless
power receiving apparatuses 20. However, the conventional wireless power transmission system has a problem in that the conventional system cannot individually control the wireless power provided to each of the plurality of wirelesspower receiving apparatuses 20. Further, in wirelessly supplying power to the plurality of wireless power receivingapparatuses 20 by the wirelesspower transmitting apparatus 10, the wirelesspower transmitting apparatus 10 merely transmits the sum of the wireless power requested by the plurality of wireless power receivingapparatuses 20, regardless of any difference between powers required by the respective wirelesspower receiving apparatuses 20. Therefore, under some circumstances, the power transmitted by the wirelesspower transmitting apparatus 10 may be less than the power required for charging the wireless power receivingapparatuses 20, which may make it impossible to perform a normal charging. - Accordingly, an aspect of the present invention is to address the above-mentioned problems occurring in the prior art, and provide at least the advantages described below. Another aspect of the present invention is to provide a method for providing wireless power to a plurality of wireless power receiving apparatuses by a single wireless power supplying apparatus.
- In accordance with an aspect of the present invention, a method of controlling charging of a battery by a wireless power receiving apparatus, using a charging power provided from a wireless power transmission device is provided. The method includes initiating charging of a battery by using a charging power provided by a resonator for wirelessly receiving power; determining whether charging of the battery has been completed; and terminating, when the charging of the battery has been completed, an operation of the resonator.
- In accordance with another aspect of the present invention, a wireless power receiving apparatus for wirelessly receiving electric power from a wireless power transmitting apparatus through an electromagnetic coupling with the wireless power transmitting apparatus is provided. The wireless power receiving apparatus includes a reception resonator set to a resonance frequency equal to a resonance frequency of a wireless power transmission apparatus, the reception resonator being coupled with a transmission resonator of the wireless power transmitting apparatus and receiving electric power from the transmission resonator; a switch connected to the reception resonator; and a charging controller for supplying the electric power received through the reception resonator to a battery, determining whether charging of the battery has been completed, controlling the switch such as to cease operation of the reception resonator upon determining that charging of the batter has completed.
- In accordance with still another aspect of the present invention, a wireless power transmitting apparatus for wirelessly supplying electric power to a wireless power receiving apparatus through an electromagnetic coupling with the wireless power receiving apparatus is provided. The wireless power transmitting apparatus includes a transmission resonator set to a resonance frequency equal to a resonance frequency of a wireless power receiving apparatus, the transmission resonator being coupled with a reception resonator of the wireless power receiving apparatus and providing electric power to the reception resonator; and a transmission controller for controlling an operation of the transmission resonator according to a charging state of the wireless power receiving apparatus.
- The above and other aspects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:
-
FIG. 1 is a block diagram illustrating an example of a conventional resonance type wireless power transmission system; -
FIG. 2 is a signal flow diagram illustrating an example of an operation of a conventional resonance type wireless power transmission system; -
FIG. 3 is a block diagram illustrating a construction of a wireless power receiving apparatus according to an embodiment of the present invention; -
FIG. 4 is a flowchart illustrating a process of a charging control method according to an embodiment of the present invention; and -
FIG. 5 is a block diagram illustrating a construction of a wireless power transmitting apparatus according to an embodiment of the present invention. - Hereinafter, the embodiments of the present invention are described in detail with reference to the accompanying drawings. Further, various specific definitions found in the following description are provided to help general understanding of the present invention, and it will be understood by those skilled in the art that various changes and modifications can be made thereto within the technical spirit and scope of the present invention. In the following description, a detailed explanation of known related functions and constitutions may be omitted to avoid obscuring the subject matter of the present invention.
- The present invention has been made to solve the above-mentioned problems and provides a method and an apparatus for controlling a wireless power receiving apparatuses by connecting an on/off switch to a reception resonator of the wireless power receiving apparatus.
-
FIG. 3 is a block diagram illustrating a construction of a wirelesspower receiving apparatus 30 according to an embodiment of the present invention, andFIG. 5 is a block diagram illustrating a construction of a wirelesspower transmitting apparatus 50 according to an embodiment of the present invention. - Referring to
FIG. 3 , the wirelesspower receiving apparatus 30 includes areception resonator 31, aswitch 32, acharging controller 33, and abattery 34. - The
reception resonator 31 is set to have the same resonance frequency as a resonance frequency of atransmission resonator 51 of the wirelesspower transmitting apparatus 50. Accordingly, thereception resonator 31 is coupled and resonates with thetransmission resonator 51. When thereception resonator 31 of the wirelesspower receiving apparatus 30 is coupled and resonates with thetransmission resonator 51 of the wirelesspower transmitting apparatus 50, wireless power is transferred from the wirelesspower transmitting apparatus 50 to the wirelesspower receiving apparatus 30, and the wirelesspower receiving apparatus 30 is thus charged. - The
switch 32 is connected with thereception resonator 31, so as to control the coupling between thereception resonator 31 and thetransmission resonator 51 of the wirelesspower transmitting apparatus 50. - When the
battery 34 has been completely charged, thecharging controller 33 interrupts the connection between thereception resonator 31 and thebattery 34 in order to terminate the connection between thereception resonator 31 and thebattery 34. To this end, thecharging controller 33 checks whether the charging of thebattery 34 has been completed. When the charging has been completed, thecharging controller 33 controls the switch 32 (i.e., opens or closes the switch 32) so as to interrupt the coupling between thereception resonator 31 and thetransmission resonator 51 of the wirelesspower transmitting apparatus 50. -
FIG. 4 is a flowchart illustrating a charging control method according to an embodiment of the present invention. - Referring to
FIG. 4 , instep 401, the wirelesspower receiving apparatus 30 starts wireless charging by receiving power transmitted from the wirelesspower transmitting apparatus 50 and supplying the charging power to thebattery 34. - Further, in
step 402, the wirelesspower receiving apparatus 30 continues receiving wireless charging power while consistently monitoring at least one of the voltage of thebattery 34 and the charging current provided to thebattery 34. Based upon the monitoring, the wirelesspower receiving apparatus 30 checks whether the charging of thebattery 34 has been completed instep 403. - Upon a determination that charging has been completed, in
step 403, theswitch 32 connected to thereception resonator 31 of the wirelesspower receiving apparatus 30 is turned off, instep 404. As a result, the coupling between thereception resonator 31 and thetransmission resonator 51 of the wirelesspower transmitting apparatus 50 is terminated, and the wirelesspower receiving apparatus 30 does not receive any more wireless power from the wirelesspower transmitting apparatus 50. - Therefore, even when the wireless
power transmitting apparatus 50 consistently provides the charging power that it can provide, the wirelesspower receiving apparatus 30 prevents an unnecessary supply of power to thebattery 34 of the wirelesspower receiving apparatus 30, afterbattery 34 is completely charged. Further, since unnecessary charging is prevented as described above, when there are a plurality of wirelesspower receiving apparatuses 30, the wirelesspower transmitting apparatus 50 can more intensively provide power to only the wirelesspower receiving apparatuses 30 that still require charging. Accordingly, charging power is more efficiently supplied to the plurality of wirelesspower receiving apparatuses 30. - Referring to
FIG. 5 , the wirelesspower transmitting apparatus 50 includes atransmission resonator 51 and atransmission controller 53 according to an embodiment of the present invention. - The
transmission resonator 51 is set to have a predetermined resonance frequency, for example, the same resonance frequency as that of thereception resonator 31 of the wirelesspower receiving apparatus 30, and transmits a wireless power through the resonance frequency. - The
transmission controller 53 controls the transmission of power to the wirelesspower receiving apparatus 30 by controlling the operation of thetransmission resonator 51. Specifically, thetransmission controller 53 monitors the wireless power transmitted through thetransmission resonator 51, so as to determine whether the wireless power is transmitted to the wirelesspower receiving apparatus 30. When thereception resonator 31 of the wirelesspower receiving apparatus 30 is not coupled with thetransmission resonator 51 and the wireless power is not transmitted to the wirelesspower receiving apparatus 30 at all, thetransmission controller 53 stops the operation of thetransmission resonator 51. - According to an embodiment of the present invention, through communication with the wireless
power receiving apparatus 30, thetransmission controller 53 receives a charging power supply request from the wirelesspower receiving apparatus 30. In response to the charging power supply request, thetransmission controller 53 determines whether to permit the transmission of power to the wirelesspower receiving apparatus 30, and, from among a plurality of wirelesspower receiving apparatuses 30, thetransmission controller 53 selectively provides only to the wireless power to wirelesspower receiving apparatuses 30 for which the transmission of power is permitted. - In the present example according to an embodiment of the present invention, the
transmission controller 53 controls power transmission to the wirelesspower receiving apparatus 30 by monitoring the wireless power transmitted through thetransmission resonator 51. However, according to another embodiment of the present invention, thetransmission controller 53 receives a message, indicating that the charging has been completed, from at least one of the wirelesspower receiving apparatuses 30 receiving electric power through the communication with the wirelesspower receiving apparatus 30. In this event, thetransmission controller 53 of the wirelesspower transmitting apparatus 50 stops supplying power to the corresponding wirelesspower receiving apparatus 30. According to this embodiment, when thetransmission controller 53 has received messages indicating that the charging has been completed, from all the wirelesspower receiving apparatuses 30 that were charging, thetransmission controller 53 stops thetransmission resonator 51 from transmitting any more power. - According to a charging control method according to an embodiment of the present invention, a wireless power transmitting apparatus can avoid unnecessarily providing electric power to the wireless power receiving apparatus having a completely charged battery.
- In addition, the wireless power transmitting apparatus can provide a necessary quantity of power to the wireless power receiving apparatus, which enables an efficient supply of charging power.
- While the present invention has been shown and described with reference to certain embodiments and drawings thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (14)
1. A method of controlling charging of a battery by a wireless power receiving apparatus, using a charging power provided from a wireless power transmission device, wherein the method comprises:
initiating charging of a battery by using a charging power provided by a resonator for wirelessly receiving power;
determining whether charging of the battery has been completed; and
terminating, when the charging of the battery has been completed, an operation of the resonator.
2. The method as claimed in claim 1 , wherein terminating the operation of the resonator comprises turning off an operation switch connected to the resonator.
3. A wireless power receiving apparatus for wirelessly receiving electric power from a wireless power transmitting apparatus through an electromagnetic coupling with the wireless power transmitting apparatus, wherein the wireless power receiving apparatus comprises:
a reception resonator set to a resonance frequency equal to a resonance frequency of a wireless power transmission apparatus, the reception resonator being coupled with a transmission resonator of the wireless power transmitting apparatus and receiving electric power from the transmission resonator;
a switch connected to the reception resonator; and
a charging controller for supplying the electric power received through the reception resonator to a battery, determining whether charging of the battery has been completed, and controlling the switch to cease operation of the reception resonator upon determining that charging of the battery has completed.
4. A wireless power transmitting apparatus for wirelessly supplying electric power to a wireless power receiving apparatus through an electromagnetic coupling with the wireless power receiving apparatus, wherein the wireless power transmitting apparatus comprises:
a transmission resonator set to a resonance frequency equal to a resonance frequency of a wireless power receiving apparatus, the transmission resonator being coupled with a reception resonator of the wireless power receiving apparatus and providing electric power to the reception resonator; and
a transmission controller for controlling an operation of the transmission resonator according to a charging state of the wireless power receiving apparatus.
5. The wireless power transmitting apparatus as claimed in claim 4 , wherein the transmission controller checks whether the wireless power transmitting apparatus is currently transmitting wireless power is transmitted to the wireless power receiving apparatus, and controls the operation of the transmission resonator according to a result of the checking.
6. The wireless power transmitting apparatus as claimed in claim 5 , wherein the transmission controller stops the operation of the transmission resonator, upon determining that the wireless power is not transmitted to the wireless power receiving apparatus.
7. The wireless power transmitting apparatus claimed in claim 6 , wherein the transmission controller controls the operation of the transmission controller according to communication with the wireless power receiving apparatus.
8. The wireless power transmitting apparatus as claimed in claim 7 , wherein the transmission controller stops the operation of the transmission controller when the transmission controller has received, from a plurality of wireless power receiving apparatuses, including the wireless power receiving apparatus, that were receiving the wireless power from the wireless transmitting apparatus, a message indicating that charging of all of the plurality of wireless power receiving apparatuses has been completed.
9. The wireless power transmitting apparatus as claimed in claim 7 , wherein the transmission controller starts the operation of the transmission controller in response to a charging power supply request received from the wireless power receiving apparatus.
10. The wireless power transmitting apparatus as claimed in claim 9 , wherein the transmission controller selectively provides, in response to the charging power supply request, the wireless power to a wireless power receiving apparatus according to whether the wireless power receiving apparatus has permission to receive charging power from the wireless power transmitting apparatus.
11. The wireless power transmitting apparatus claimed in claim 5 , wherein the transmission controller controls the operation of the transmission controller according to communication with the wireless power receiving apparatus.
12. The wireless power transmitting apparatus as claimed in claim 11 , wherein the transmission controller stops the operation of the transmission controller when the transmission controller has received, from a plurality of wireless power receiving apparatuses, including the wireless power receiving apparatus, that were receiving the wireless power from the wireless transmitting apparatus, a message indicating that charging of all of the plurality of wireless power receiving apparatuses has been completed.
13. The wireless power transmitting apparatus as claimed in claim 11 , wherein the transmission controller starts the operation of the transmission controller in response to a charging power supply request received from the wireless power receiving apparatus.
14. The wireless power transmitting apparatus as claimed in claim 13 , wherein the transmission controller selectively provides, in response to the charging power supply request, the wireless power to a wireless power receiving apparatus according to whether the wireless power receiving apparatus has permission to receive charging power from the wireless power transmitting apparatus.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR10-2012-0020957 | 2012-02-29 | ||
KR1020120020957A KR20130099445A (en) | 2012-02-29 | 2012-02-29 | Wireless charging control method and wireless charging apparatus applied to the same |
Publications (1)
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US20130221912A1 true US20130221912A1 (en) | 2013-08-29 |
Family
ID=47900577
Family Applications (1)
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US13/766,397 Abandoned US20130221912A1 (en) | 2012-02-29 | 2013-02-13 | Wireless charging control method and wireless charging apparatus employing the same |
Country Status (3)
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US (1) | US20130221912A1 (en) |
EP (1) | EP2634891A3 (en) |
KR (1) | KR20130099445A (en) |
Cited By (9)
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US9628707B2 (en) | 2014-12-23 | 2017-04-18 | PogoTec, Inc. | Wireless camera systems and methods |
US9635222B2 (en) | 2014-08-03 | 2017-04-25 | PogoTec, Inc. | Wearable camera systems and apparatus for aligning an eyewear camera |
US9823494B2 (en) | 2014-08-03 | 2017-11-21 | PogoTec, Inc. | Wearable camera systems and apparatus and method for attaching camera systems or other electronic devices to wearable articles |
US10241351B2 (en) | 2015-06-10 | 2019-03-26 | PogoTec, Inc. | Eyewear with magnetic track for electronic wearable device |
US10341787B2 (en) | 2015-10-29 | 2019-07-02 | PogoTec, Inc. | Hearing aid adapted for wireless power reception |
US10481417B2 (en) | 2015-06-10 | 2019-11-19 | PogoTec, Inc. | Magnetic attachment mechanism for electronic wearable device |
US10863060B2 (en) | 2016-11-08 | 2020-12-08 | PogoTec, Inc. | Smart case for electronic wearable device |
US11300857B2 (en) | 2018-11-13 | 2022-04-12 | Opkix, Inc. | Wearable mounts for portable camera |
US11558538B2 (en) | 2016-03-18 | 2023-01-17 | Opkix, Inc. | Portable camera system |
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- 2012-02-29 KR KR1020120020957A patent/KR20130099445A/en not_active Application Discontinuation
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- 2013-02-13 US US13/766,397 patent/US20130221912A1/en not_active Abandoned
- 2013-02-27 EP EP13156888.3A patent/EP2634891A3/en not_active Withdrawn
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US20100201314A1 (en) * | 2009-02-12 | 2010-08-12 | Qualcomm Incorporated | Wireless power transfer for low power devices |
US20110018494A1 (en) * | 2009-07-22 | 2011-01-27 | Sony Corporation | Power receiving apparatus, power transmission system, charging apparatus and power transmission method |
US8559659B2 (en) * | 2011-05-19 | 2013-10-15 | Lg Electronics Inc. | Control of audio output state based on wireless charging |
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US10185163B2 (en) | 2014-08-03 | 2019-01-22 | PogoTec, Inc. | Wearable camera systems and apparatus and method for attaching camera systems or other electronic devices to wearable articles |
US9635222B2 (en) | 2014-08-03 | 2017-04-25 | PogoTec, Inc. | Wearable camera systems and apparatus for aligning an eyewear camera |
US9823494B2 (en) | 2014-08-03 | 2017-11-21 | PogoTec, Inc. | Wearable camera systems and apparatus and method for attaching camera systems or other electronic devices to wearable articles |
US10620459B2 (en) | 2014-08-03 | 2020-04-14 | PogoTec, Inc. | Wearable camera systems and apparatus and method for attaching camera systems or other electronic devices to wearable articles |
US9930257B2 (en) | 2014-12-23 | 2018-03-27 | PogoTec, Inc. | Wearable camera system |
US10348965B2 (en) | 2014-12-23 | 2019-07-09 | PogoTec, Inc. | Wearable camera system |
US9628707B2 (en) | 2014-12-23 | 2017-04-18 | PogoTec, Inc. | Wireless camera systems and methods |
US10887516B2 (en) | 2014-12-23 | 2021-01-05 | PogoTec, Inc. | Wearable camera system |
US10241351B2 (en) | 2015-06-10 | 2019-03-26 | PogoTec, Inc. | Eyewear with magnetic track for electronic wearable device |
US10481417B2 (en) | 2015-06-10 | 2019-11-19 | PogoTec, Inc. | Magnetic attachment mechanism for electronic wearable device |
US10341787B2 (en) | 2015-10-29 | 2019-07-02 | PogoTec, Inc. | Hearing aid adapted for wireless power reception |
US11166112B2 (en) | 2015-10-29 | 2021-11-02 | PogoTec, Inc. | Hearing aid adapted for wireless power reception |
US11558538B2 (en) | 2016-03-18 | 2023-01-17 | Opkix, Inc. | Portable camera system |
US10863060B2 (en) | 2016-11-08 | 2020-12-08 | PogoTec, Inc. | Smart case for electronic wearable device |
US11300857B2 (en) | 2018-11-13 | 2022-04-12 | Opkix, Inc. | Wearable mounts for portable camera |
Also Published As
Publication number | Publication date |
---|---|
EP2634891A3 (en) | 2018-01-10 |
EP2634891A2 (en) | 2013-09-04 |
KR20130099445A (en) | 2013-09-06 |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: SAMSUNG ELECTRONICS CO., LTD., KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KANG, NOH-GYOUNG;CHOI, JUN-IL;WON, EUN-TAE;REEL/FRAME:029886/0249 Effective date: 20130205 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |